Coin-controlled actuating mechanism for autopneumatic pianos.



PATENTED APR. 11, 1905.

A. J. HOBART. COIN CONTROLLED AGTUATING MECHANISM FOR AUTOPNEUMATIGPIANOS.

APPLICATION FILED JULY'll. 1904.

2 SHEETS-SHEET 1.

h c'lrzsses MW? MM PATENTED APR. 11, 1905. A. J. HDBAR-T. COINCONTROLLED AGTUATING MECHANISM FOR AUTOPNEUMATIG PIANOS.

APPLICATION FILED JULY 11. 1904.

2 SHEETSSHBET 2.

No. 786,899. v Patented. April 11, 1905.

UNITED STATES PATENT OFFICE,

ADAM J. HOBART. OF ST. JOHNSVILLE, NEW YORK, ASSIGNOR TO ROTH ANDENGELHARDT, OF NEW YORK, N. Y., A FIRM.

COIN-CONTROLLED ACTUATING MECHANISM FOR AUTOPNEUMATIC PIANOS.

SPECIFICATION forming part of Letters Patent No. 786,899, dated April11, 1905,

Application filed July 11, 1904. Serial No. 215,989.

To all whom it may OOH p with bellows p located in a chamber 9 of 5 Beit known that l, ADAM J. HOBART, a citia vacuum-chest P. The otherchamber, 7)", zen of the United States, residing at St. J ohnsof thevacuum-chest has a vent p and contains ville, Montgomery county, Stateof New York, a valve 71", carrying a pin 12, adapted to bear haveinvented new and useful Improvements upon bellows p. The chamber 9*communiin Coin-Controlled Actuating Mechanism for cates by a pipe a withsuction-bellows a, se- AutopneumaticPianos, of which the following curedto frame ,0 opposite lever f. To the is a specification. movable boardof bellows a is secured a plun- This invention relates to improved meansger m, that passes through a perforation g of I for starting anautopneumatic piano or pianoframe g and is adapted to engage the back ofplayer by the introduction of a coin and for switch-knife 2". ooarresting the same after the piece has been The operation is as follows:When the leplayed. ver f is tilted by the introduction of a coin 1n theaccompanying drawings, Figure 1 is in the manner described, it willrelease knife 5 a front elevation of my improved eoin-conand the latterwill by its spring 9: be swung trolled actuating mechanism; Fig. 2, adetail to close the switch. This will start the elec- 5 front elevationof the switch, showing it open; tromotor, the current traveling asfollows: Fig. 3, a plan; Fig. 4, a side view thereof, and From source ofelectricity A through wire 0, Fig. 5 a detail cross-section through thevacucontact 7', knife '17, contact 7;, wire 0', electro- 20 urn-chestand tracker-bar. motor 5, and wire 0 back to source A. \Vhcn The letter(t represents the power-shaft of the end perforation of the music-sheetregisan autopneumatic piano or piano-player, which ters with the duct 0of the tracker-bar, which receives its motion from the driving-shaft bis made in addition to the hammer-operating of an electromotorb bypulleys 5 c and ropea ducts, air is admitted throught duct 0' and the 25 c is the tracker-bar or ductbridge, and (Z tube p into bellows p toexpand the same.

the feed-roller for the perforated music-sheet, This will open valve 7)by pin 7) and will all as usual. close vent 2). From the vacuum-chamber7) In order to start the electromotor by the in air is constantlywithdrawn by a pump, (not trod uction of a coin and arrest the sameafter shown,) and thus the opening of the valve 7) 0 a piece of musichas been played, I have dcwill cause a suction in chamber and convisedthe following construction: 6 is the coinsequently through tube a inbellows w to col 8O chute, and f a two-arm lever, which is fullapse thelatter and project plunger m against crumed to a frame g at f and isprovided switch-knife a. The means above described with a coin-restfbelow chute 0. hen a for establishing communication between the 3 5 coinis dropped into the chute, it will fall upon exhaust-pipe 92. and thevacuum-chest P upon rest f to tilt lever f and will then drop into theregistration of the perforations in the 5 a cash-box 71/, after whichthe lever f will be duct-bridge and the music-sheet are the samereturned to its normal position by aspringf. as described in Patent No.74:1,072, granted dis a switch-knife pivoted to frame g at 2' to A. 1.Roth October 13, 1903. By the 4 and havinga notch i that is adapted tobe enmotion of the plunger 11/. the switch will be gaged by a hook f oflever f. The switchopened to arrest the electromotor, and the 9 knifeisinfluenced by a spring 71, which tends switch-knife '5 will becomereengaged with to throw the same into engagement with the hook f oflever f. The perforation in the contacts 17s of a switch which ismounted upon music-sheet having passed the perforation c 45 an insulatorZ of frame 9. of duct-bridge c suction in pipe or ceases and Thetracker-bar 0 has a duct 0 adapted to the bellows n is expanded by itsspring a to register with a corresponding perforation of withdrawplunger m. The parts are thus rethe music-sheet at the end of the pieceto be turned to their normal position (shown in Fig. played. The duct 0communicates by a tube 1) ready for the introduction of a new coin.

What I claim is In a ooin-controlled actuating mechanism forautopneumatic pianos, the combination of a tracker-bar having a numberof ducts 5 with a vacuum-chest connected to one of said ducts, anexhaust-pipe communicating with the vacuum-chest, bellows communicatingwith the exhaust-pipe, a plunger connected to the bellows, aswitch-knife adapted to be I0 engaged at one side by the plunger, acoincontrolleol lever adapted to engage the other side of theswitch-knife, a switch, and a mo tor in circuit, substantially asspecified.

Signed by me at St. J ohnsville, Montgomery county, New York, this 7thday of July, I 5

ADAM J. HOBART. l/Vitnesses:

HENRY .H. CARROLL, XVALTER L. ENGELHARDT.

